Preparation for dyeing hairs, furs, and the like.



UNITED STATES PATENT OFFICE.

ARNOLD ERLENBACH. OF DESSAU, GERMANY, ASSINOB, T0 ACTIEN GESELLSCHAFT FUR ANILIN IABBIKATION, 0!" BERLIN, GERMANY.

PBEPABATION FOB DYEING HAIBS, FUBS, AND THE LIKE.

Specification. a: Letters rims.

Patented July 28, 1914.

No Drawing. Original application filed April 9, 1010 Berle! Io. 4,618. Divided and this application fled September 19; 1910. Io. 582,099.

T 0 all whom it may concern:

Be it known that I, Annow Emnaa'cu, a; subject of the King of Bavaria, residing at Dessau, Germany, my postpflice address being Schillerstrasse 5, Dessau, Germany, have invented certain new and useful 1m rovements in New Preparations foryeing, Hairs, Furs, and the like, of which the following is a specification.

My present invention relates to new preparations fordyeing hairs, furs and the like. I have found that mixtures of aromatic para-diamins of the general formula:

an, (l) as N81) 8 (8) in which formula R means an inorganic substituent, such as a hydrogen atom, a chlorin atom, the hydroxyl group, the suifonic group or the like, with an aromatic diamin of the general formula:

' 3 C15 NH:

in which formula It means an oxyalkyl group, such as OCH or 00 11,, are most excellent dyes for hairs, furs and the like. These new dyes are to be used in combination with a suitable oxidizing agent, such as hydrogen-peroxid. Thus are obtained bright blue-blackjtones of great stability for instance with a new preparation comprising para-phenylenediamin and meta-diaminoani'sol i(OCH,:NH,:NH,:1:2:4).

This result is very surprising because metadiaminoanisol alone if app ied to furs in the resence of a suitable oxidizing agent, pro uoes only a reddish brown tint, whereas ara-phenylenediamin alone yields a coal-' new mixtures reactvin the presence of an oxidizing agent in a very specific manner so that a joint oxidation of the two diamins aplack. It follows therefrom that m 40 arts of meta-diaminoanisol are thoroug 1y mixed together each of the two components being previousi the components may be melted toget er thus forming a homo neous mass. This new preparation in or er to dye furs is dissolved 1n a suitable proportion of water, for instance 18000 parts. To the solution thus obtained is added 2000 parts of hydrogen peroxid of 3% strength. This mixed solution represents the dyebath in which the reviously well-washed furs are handl as usual. Thus are obtained intense'blue-blaek dyein s of great stability. The result is essentia ly the same if the furs to be dyed are previously mordant ed' with a suitable salt, for instance with a salt of iron.

The new preparation as obtained above represents in the dry State when powdered a dark gray to dark brown or black powder which is rather soluble in water to a bluishred to dark bluish-red solution; this solution becomes on the addition of ferric chlorid dark yellowish red to dark brownish caustic alkali it becomes at first lighter; and i y thoroughly round browner, then dark brown and separates afterward a darkprecipitate. The new composition is diflicultly soluble in ether and benzene; in alcohol it dissolvesto a dull violet solution and in acetone and glacial acetic acid to a dark bluish-red solution.

2. 60 parts of para-phenylenediamin and 40 parts of meta-diaminophenetol, each of these components being previously very well ground are mixed together; or the components ma also be heated together so that they melt and form a homogeneous mass. Also with this new preparation, in the mannet as described in the foregoing example loo-bled tones of great stability are obained on furs; also this new preparation can be applied to furs which are previousl mordanted with a salt of a suitable meta such as a salt or compound of iron.

3. In order to give an example for a new preparation comprising an aromatic paradiamin of the above-giyen general formul in which R is an inorganic substituent, an an aromatic meta-diamin of the above-given general formula, the following new composition may be given: 100 parts of the sulfate of chloro-para-phimvlenediamin are thoroughly rz w l with 53 parts of the sulfate of menial .uinophenetol: this mixture represents the new preparation which may beemployed for instance as follows: In preparing the dye-hath 8 parts of this new prepa ration are dissolved in water with the addition of 8 parts of concentrated ammonium hydroxid (0.91 specific gravity). This solution is diluted with water and to it is added 190 parts of hydrogen-pcroxid (of about strength) the whole being filled up with water to 1000 parts by weight. The solution thus prepared represents the dyebath in which the furs to be dyed are introduced, after having been previously mordanted in -the usual manner in an aqueous solution containinglO parts of ferrous sul fate per 1000 parts of water. The dyeing operation is finished after about 8-10 hours, whereupon the furs are thoroughly Washed with water, dried and finished in the usual way. Thus is obtained a deep black with a slightly reddish cast.

It is obvious that my present inventionis not limited to the above examples or to the details given therein. First may be stated that the proportions of the ingredients may be varied inordcr to obtain the best result;

the special proportions of the respective paradiamin and meta-diamin depend to a great deal upon the desired shade and on the other side upon the special nature of the hairs or the furs to be dyed.

Of course my new preparations may be offered to the trade either in solution, or in the oolid state. In the latter case the use thereof may he performed as given in the above examples. For the preparations in the solid form also a salt of the para-diamin or of the metzrdiamin respectively may he used. If myhew preparations are offered as solutions these may be diluted with water toa suitable concentration and then added with us, i Quays u, 1 l) 11!,

in which formula R means a univalent inorpanic substituent composed at most of three inorganic elements, and an aromatic metadiamin or the general formula:

a n CaH3 N z (3) in which formula R means an oxyalkyl group. 1

2. As new compositions of'niatter, new preparations for dyeing hairs, furs and the like comprising an aromatic para-diamin of the general formula:

in which formula R means a hydrogen atom, and an aromatic meta-diamin of the general formula ,R (1 NE: NH: in which formula R means an oxyalkyl group which new preparations in the dry state when powdered form dark gray to dark brown or black powders being rather soluble inwater and difiicultly soluble in ether and benzeneywhereas'they are rather soluble in alcohol, acetone and glacial acetic acid, these new preparations reducing on hairs, furs and the like in. com ination with. an oxidizing agent bluish-black to blue black or black tints of great stability.

3. As a new composition of mattena, new preparation for dyeing hairs, furs and the like, comprising parahenylencdiamin and metu-diaminoanisol, W ich new preparation in the dry state when powdered forms a dark gray to dark brown or black powder which is rather soluble in water to a-bluishred to dark hluish-red, which solution on addition of ferric chlorid becomes dark yellowish red to dark brownish red and which solution on the addition of potassium bi chromate at once separates a dark violet precipitate, whereas by the addition of hvdi'ogen-peroxid and a small quantity of a caustic alkali it becomes at first lighter and browncr, then dark brown and separates,

afterward a dark precipitate, which new composition is ditlicultly soluble in ether and benzene and dissolves in alcohol to a dull violet solution and in acetone and glacial acetic acid to a dark bluish-red solution, this new preparation producing on hairs, furs and the like in combination with an ()XldlZ- ing agent bluish-black to blue-black of a great. stability.

In testimony whereof I. have hereunto set my hand in presence of two subscribing witnesses.

DR. ARNOLD ERLENBACH. Witnesses:

RUDOLPH FKICKE, ALBERT R. llloulws'rz. 

